850999 has 4 divisors (see below), whose sum is σ = 861336. Its totient is φ = 840664.

The previous prime is 850979. The next prime is 851009. The reversal of 850999 is 999058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 850999 - 2¹⁵ = 818231 is a prime.

It is a Duffinian number.

850999 is a modest number, since divided by 999 gives 850 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5044 + ... + 5209.

It is an arithmetic number, because the mean of its divisors is an integer number (215334).

2⁸⁵⁰⁹⁹⁹ is an apocalyptic number.

850999 is a deficient number, since it is larger than the sum of its proper divisors (10337).

850999 is a wasteful number, since it uses less digits than its factorization.

850999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 850999 is about 922.4960704523. The cubic root of 850999 is about 94.7639198157.

It can be divided in two parts, 850 and 999, that added together give a square (1849 = 43²).

The spelling of 850999 in words is "eight hundred fifty thousand, nine hundred ninety-nine".